Note saying "don't forget!"Good news for people who forget the odd word – some research suggests it’s not a sign of dementia, but rather an ordinary side-effect of ageing.But what about walking into a room with strident purpose, looking around once you enter the door, and thinking, “Wait, why did I come in here”?The phenomenon is so common that it has a name. Documented by the University of Notre Dame in the Quarterly Journal of Experimental Psychology, the confusing experience has been dubbed “The Doorway Effect.” But what does it mean, and why does it happen?There really does seem to be something about the door itself In the University of Notre Dame research, scientists tested participants’ memory when they had and had not moved locations. They found that people tended to forget what they were holding or doing when they crossed through a boundary like a door – even c